Electricity and Stability of net would be some of the major problem you would encounter. Be sure to study or do some research before engaging in mining. Also, make sure that your rig would really compensate your rig so better invest a good one so that it could mine you enough to pay for the electric bill and somehow save even for a little. Also, be aware about environment in which you set up your rig even though a cooler to cool down your rig there are still accidents that are unavoidable so be sure to check if your apartment and/or house can support your mining activities to be safe and to prevent further damage if ever.